Aeration Hazard Help

I just bid on my first aeration job. I know I need to mark sprinkler heads that are above ground but what about pop up heads? Also the yard has some in ground lighting. Do I need to try to avoid the wires or would they be to deep. The aerator goes about 3" deep. Thanks for your help.

Have in a contract or written agreement that you are not responsible for non-obvious items like shallow sprinkler lines, shallow wire from invisible dog fence maybe.
Also find the valve boxes for sprinkler valves if they are out in the lawn and when you turn the sprinkler system on to do flagging notice anything that is not working properly and tell the customer to cover your you know what or you might hear well it was working before you did it and its not a good thing to hear at the end of busting your hump for some dead presidents$$$.